Any Chance Of A Better Opencart Manual?

The opencart online manual is appreciated but basic. Would be great if someone at opencart would publish (paper or online) a proper full-blown 'schematic' type manual that would visually help users to quickly locate what specific file affects what specific portion or feature on a page (based on default template). In a lot of instances folks just need some specific direction as to in 'which' file and 'where' to find it in order to edit a specific feature. (Need more than just a list of the various directories and what they contain). I'm sure this would save everyone a lot of time compared to continually posting on the forums for information? Just a thought. P.S. Don't get me wrong, Opencart is a great program!!